<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" v-model="isCheckAll" />
    </label>
    <span>
      <span>已完成{{ isDoneCount }}</span> / 全部{{ total }}
    </span>
    <button class="btn btn-danger" v-show="isDoneCount" @click="batchRemove">
      清除已完成任务
    </button>
  </div>
</template>

<script>
export default {
  name: "TodoFooter",
  props: {
    isDoneCount: Number,
    total: Number,
    updateAllTodoIsDone: Function,
    delIsDoneTodo: Function,
  },
  computed: {
    isCheckAll: {
      get() {
        return this.total > 0 && this.isDoneCount === this.total;
      },
      set(val) {
        // console.log(val);
        this.updateAllTodoIsDone(val);
      },
    },
  },
  methods: {
    batchRemove() {
      if (window.confirm("您确认要删除已完成的待办事项吗？")) {
        this.delIsDoneTodo();
      }
    },
  },
};
</script>

<style>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>